Table of Contents
Advertisement
Voice Modules (VCMs & DPVs)
DPV E&M Signaling
E&M Types I, V and SSDC5A signaling uses an implicit ground connection between the switching
equipment (PBX) and the transmission equipment (OCM), for the return current in the E and M
signaling leads. On the OCM, this return path is via chassis ground.
Make sure that a connection is made between the OCM's chassis ground and the reference ground
of the switching equipment when using E&M Type I, V or SSDC5A signaling.
Figure
6-6,
Figure
DPV
M-Lead
Detector
E-Lead Driver
Note: The connecting equipment ground must be connected to the OCM chassis ground.
Figure 6-6
6-20
6-7, and
Figure 6-8
show the E&M signaling types and their busy and idle states.
CONNECTING EQUIPMENT
Modular
jack pin 7
M
OCM Chassis
Ground
Modular
jack pin 3
idle
M
busy
OCM Chassis
Ground
INTERFACE POINT
Type I E&M Signaling Connections
Office Connunications Manager OCM-1000/OCM-2000
Installation & Operation
M-Lead Driver
idle
busy
Ground
-48V
Ground
E-Lead
Detector
-48V
Ground
DPV Overview
036R340-000
Issue 16
Advertisement
Table of Contents
